It's your lucky day: A new episode of Ask a Mortician has arrived, full of totally true death facts.

In this new clip, our mortician friend Caitlin Doughty explains what happens to stuff like breast implants or metal hip replacement joints when a body is cremated. Hint: That road sign you drove by earlier might have been someone's knees. Also: Exploding Pacemakers would be a good band name.

For more Ask a Mortician, click here. You can also follow Caitlin on Twitter and Facebook and at Order Of The Good Death. Her book comes out September 15th.